Archean (3.33 Ga) microbe-sediment systems were diverse and flourished in a hydrothermal context

Interacting, diverse microbe-sediment systems exist in natural environments today but have not yet been recognized in the oldest records of life on Earth (older than 3.3 Ga) because of lack of distinctive biomarker molecules and patchy preservation of microbial paleocommunities. In an in-situ outcro...

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Autores principales: Westall, Frances, Campbell, Kathleen A., Bréhéret, Jean Gabriel, Foucher, Frédéric, Gautret, Pascale, Hubert, Axelle, Sorieul, S., Grassineau, Nathalie, Guido, Diego Martín
Formato: Articulo
Lenguaje:Inglés
Publicado: 2015
Materias:
Geología
Geology
Archean
Hydrothermal circulation
Outcrop
Earth science
Phototroph
Fossilization
Greenstone belt
Early life
Sedimentary rock
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/127091
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-127091
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
Geology
Archean
Hydrothermal circulation
Outcrop
Earth science
Phototroph
Fossilization
Greenstone belt
Early life
Sedimentary rock
spellingShingle Geología
Geology
Archean
Hydrothermal circulation
Outcrop
Earth science
Phototroph
Fossilization
Greenstone belt
Early life
Sedimentary rock
Westall, Frances
Campbell, Kathleen A.
Bréhéret, Jean Gabriel
Foucher, Frédéric
Gautret, Pascale
Hubert, Axelle
Sorieul, S.
Grassineau, Nathalie
Guido, Diego Martín
Archean (3.33 Ga) microbe-sediment systems were diverse and flourished in a hydrothermal context
topic_facet Geología
Geology
Archean
Hydrothermal circulation
Outcrop
Earth science
Phototroph
Fossilization
Greenstone belt
Early life
Sedimentary rock
description Interacting, diverse microbe-sediment systems exist in natural environments today but have not yet been recognized in the oldest records of life on Earth (older than 3.3 Ga) because of lack of distinctive biomarker molecules and patchy preservation of microbial paleocommunities. In an in-situ outcrop- to microbial-scale study, we have differentiated probable phototrophic, chemolithotrophic, and chemo-organotrophic fossil microbial signatures in a nearshore volcanogenic sedimentary setting in 3.33 Ga rocks of the Josefsdal Chert, Barberton greenstone belt, South Africa, while demonstrating the importance of contemporaneous hydrothermal activity. Hydrothermal fluids, as a nutrient source, strongly controlled the development and distribution of the microbial communities and, as a silicifying agent, contributed to their rapid fossilization. We thus show that intricate microbe-sediment systems are deep-rooted in time and that at least some early life may indeed have been thermophilic.
format Articulo
Articulo
author Westall, Frances
Campbell, Kathleen A.
Bréhéret, Jean Gabriel
Foucher, Frédéric
Gautret, Pascale
Hubert, Axelle
Sorieul, S.
Grassineau, Nathalie
Guido, Diego Martín
author_facet Westall, Frances
Campbell, Kathleen A.
Bréhéret, Jean Gabriel
Foucher, Frédéric
Gautret, Pascale
Hubert, Axelle
Sorieul, S.
Grassineau, Nathalie
Guido, Diego Martín
author_sort Westall, Frances
title Archean (3.33 Ga) microbe-sediment systems were diverse and flourished in a hydrothermal context
title_short Archean (3.33 Ga) microbe-sediment systems were diverse and flourished in a hydrothermal context
title_full Archean (3.33 Ga) microbe-sediment systems were diverse and flourished in a hydrothermal context
title_fullStr Archean (3.33 Ga) microbe-sediment systems were diverse and flourished in a hydrothermal context
title_full_unstemmed Archean (3.33 Ga) microbe-sediment systems were diverse and flourished in a hydrothermal context
title_sort archean (3.33 ga) microbe-sediment systems were diverse and flourished in a hydrothermal context
publishDate 2015
url http://sedici.unlp.edu.ar/handle/10915/127091
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